When I was growing up, the question of whether I preferred Summer or Winter was barely a discussion. Summer in Scotland: it basically just rains every day. Winter? It's cold and at least there's the chance of snow. And you can stay indoors and play video games! Australia? Things flip a little for me.
In Summer it's actually hot in Australia. In Australia sometimes it can get so hot that you can't go outside! That's when you get to stay home and play the video games.
But just on a broader note: Australia is a country built for Summer. It feels like a country where outdoor pursuits are actually worthwhile and supported by broader culture. In short, I really like Summer here in Australia.
The only caveat is this: as someone who loves climbing, the winter creates better conditions for getting outdoors and climbing on rock. There's more friction, you can climb harder stuff.
It's a broad question, and somewhat outside the scope of video games: but which do you prefer?